Flow mixing valve

Abstract

The mixed flow valve comprises a valve block, the valve block is provided with a valve element installation channel and channel sets capable of being communicated with the valve element installation channel, a valve element is arranged in the valve element installation channel, and the valve element acts to be used for adjusting the communication proportion between the channel sets; a temperature sensing piece capable of expanding or contracting according to the temperature is arranged in the valve element installation channel and used for driving the valve element to move in the axial direction of the valve element installation channel. Movement of the valve element is achieved based on the fact that the temperature sensing piece reacts with the temperature of liquid flowing through the valve element, specifically, in the process that the temperature of the liquid flowing into the valve element rises gradually, the temperature sensing piece expands gradually, the valve element is pushed to move in the process that the temperature sensing piece expands gradually, and therefore the communication degree between the pipeline sets is adjusted, and the temperature of the liquid flowing through the valve element is adjusted. Therefore, the flow mixing proportion of the flow mixing valve can be adjusted in a pure mechanical mode, and the flow mixing valve is wide in application range, not prone to damage and long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of mixing flow valves, and in particular to a mixing flow valve capable of automatically adjusting liquid temperature. Background Art

[0002] Prior art, such as a water mixing valve with patent number CN105889567A, includes a valve body, a valve cavity is arranged in the valve body, an end cover is arranged at one end of the valve cavity in the valve body, a mixed water outlet channel and a cold water outlet channel are arranged in the cover, a cold water inlet and a hot water input channel are arranged on the valve body, the cold water inlet is connected to the valve cavity in the valve body, a connecting channel connecting the hot water input channel and the middle part of the mixed water outlet channel is arranged on the end cover, a valve stem is rotatably arranged on the valve body, the end of the valve stem extending out of the valve body is connected to the motor, the motor is electrically connected to the controller, and the valve stem is located in the valve body. A valve core is provided at the end, and a spring is also sleeved on the valve stem to press the valve core against the inner surface of the end cover. A liquid outlet is provided on the valve core, and a buffer cavity connected to the connecting channel is provided on the end cover. The cross-sectional area of ​​the cold water outlet channel close to the valve core end gradually decreases in the direction away from the mixed outlet channel. The connecting area between the liquid outlet hole and the mixed outlet channel and the cold water outlet channel can be adjusted by rotating the valve core. A water inlet temperature sensor is provided at the hot water input channel or at the outlet of the hot water supply device connected to the hot water input channel, and the water inlet temperature sensor is electrically connected to the controller.

[0003] It can be seen that the movement of the valve core in the prior art needs to rely on a motor, in conjunction with a controller and a temperature sensor. It is limited by electric energy and the electric control method is prone to errors, causing damage to the valve core. At the same time, when used in outdoor environments for a long time, water may enter the motor, thereby shortening the service life of the mixing valve and easily causing failures that damage the valve core. Summary of the invention

[0004] The purpose of the invention is to provide a mixing flow valve, which solves the problem that the existing mixing flow valve is limited in use and prone to failure.

[0005] The present invention is implemented as follows: a mixing valve comprises a valve block, wherein the valve block is provided with a valve core installation channel and a channel group which can be connected to the valve core installation channel, a valve core is provided in the valve core installation channel, and the valve core is used to adjust the connection ratio between the channel groups; a temperature sensing element which can expand or contract according to temperature is provided in the valve core installation channel, and the temperature sensing element is used to drive the valve core to move axially along the valve core installation channel.

[0006] The valve core is movable, and the degree of channel connectivity with the channel groups can be adjusted during the movement, thereby adjusting the mixed flow ratio and ensuring that the temperature range of the liquid flowing out of the mixing valve is accurate. The movement of the valve core of the present invention is achieved based on the reaction of the temperature sensing component to the temperature of the liquid flowing through the valve core. Specifically, when the temperature of the liquid flowing into the valve core gradually increases, the temperature sensing component also gradually expands. During the gradual expansion of the temperature sensing component, the valve core is pushed to move, thereby adjusting the degree of connectivity between the pipeline groups. Conversely, the temperature sensing component contracts and drives the valve core to move in the opposite direction. Therefore, the present invention realizes pure mechanical adjustment of the mixed flow ratio of the mixing valve, has a wide range of applications, is not easy to be damaged, and has a long service life.

[0007] A further technical solution of the present invention is: a mixed flow area is provided in the valve core, at least two openings are provided on the valve core for connecting the channel group and the mixed flow area, one end of the temperature sensing element is placed in the mixed flow area and connected to the valve core, and the other end of the temperature sensing element is fixed. One end of the temperature sensing element is placed in the mixed flow area, and the temperature sensing element adjusts the distance of movement of the valve core according to the liquid temperature in the mixed flow area, so that the connection ratio between the mixed flow area and the channel group is adjusted. At the same time, the temperature sensing element is placed in the mixed flow area, which can effectively reduce the space occupied. The existing method of connecting the valve core and the motor not only occupies a large space, but also the motor is exposed and prone to failure. The present invention solves this problem well.

[0008] A further technical solution of the present invention is that a spring is provided between the valve core and the valve core installation passage, and the spring can effectively ensure the valve core is reset and the precision of the mixing valve.

[0009] A further technical solution of the present invention is: the channel group includes a first input channel, a second input channel and an output channel, the mixed flow area is connected to the output channel, and the movement of the valve core is used to adjust the communication ratio of the mixed flow area to the first input channel and the second input channel. The output channel is always connected to the mixed flow area, and the movement of the valve core is used to adjust the communication ratio of the first input channel, the second input channel and the mixed flow area, thereby realizing the ratio adjustment of the input liquid.

[0010] A further technical solution of the present invention is: a pressure measuring joint is provided on the valve block, and the pressure measuring joint is connected to the mixed flow area for testing the liquid pressure in the mixed flow area. The pressure measuring joint is integrated on the valve block, can timely detect the pressure of the liquid, and fully utilizes the space of the valve block.

[0011] A further technical solution of the present invention is: one end of the valve core installation channel is open, and the open end is provided with a stopper connected to the temperature sensing element. One end of the valve core installation channel is open, which is convenient for installing and replacing the valve core, and the stopper is installed at the open end, which can effectively seal the valve core installation channel.

[0012] A further technical solution of the present invention is that the valve block is a cubic structure, the channel group includes a first input channel, a second input channel and an output channel, the first input channel, the second input channel and the output channel are all connected to the valve core installation channel and are respectively placed on different end surfaces of the valve block. The first input channel, the second input channel and the third input channel are located on different end surfaces of the valve block, which effectively reduces the volume requirement of the valve block.

[0013] A further technical solution of the present invention is that the first input channel and the output channel are placed on opposite sides of the valve block, and the second input channel is placed on a surface perpendicular to the valve core installation channel. This arrangement makes the channel group easier to process and the channels are shorter, requiring a smaller volume for the valve block.

[0014] A further technical solution of the present invention is that the output channel is externally connected to a pipe fitting, and a second temperature sensor is provided on the pipe fitting. The second temperature sensor is used to sense the temperature of the liquid output by the mixing valve and control the flow rate of the liquid flowing into the mixing valve according to the inflow temperature.

[0015] The beneficial effects of the present invention are as follows: the valve core is movable, and the degree of channel connectivity with the channel groups can be adjusted during the movement, thereby adjusting the mixed flow ratio and ensuring that the temperature range of the liquid flowing out of the mixing valve is accurate; the movement of the valve core of the present invention is achieved based on the reaction of the temperature sensing component to the temperature of the liquid flowing through the valve core. Specifically, as the temperature of the liquid flowing into the valve core gradually increases, the temperature sensing component also gradually expands, and the valve core is pushed to move during the gradual expansion of the temperature sensing component, thereby adjusting the degree of connectivity between the pipeline groups. Conversely, the temperature sensing component contracts and drives the valve core to move in the opposite direction. Therefore, the present invention realizes pure mechanical adjustment of the mixed flow ratio of the mixing valve, has a wide range of applications, is not easy to be damaged, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded diagram of a mixing valve provided by the present invention;

[0017] Figure 2 It is a structural schematic diagram of the mixing flow valve provided by the present invention;

[0018] Figure 3 It is the AA cross-sectional view provided by the present invention;

[0019] Figure 4 It is a structural schematic diagram of the valve core provided by the present invention;

[0020] Figure 5 It is a BB cross-sectional view provided by the present invention.

[0021] Figure numerals: 9. mixing valve, 90. valve block, 91. valve core installation channel, 92. first input channel, 93. second input channel, 94. output channel, 95. valve core, 96. temperature sensing component, 97. spring, 98. stopper, 99. mixing area, 10. second temperature sensor, 15. pressure measuring joint, 19. pipe fitting. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0024] Embodiment 1:

[0025] Figure 1-5 A mixing valve is shown, including a valve block 90, on which a valve core installation channel 91 and a channel group that can be connected to the valve core installation channel 91 are provided, and a valve core 95 is provided in the valve core installation channel 91, and the valve core 95 is used to adjust the connection ratio between the channel groups; it is characterized in that: a temperature sensing element 96 that can expand or contract according to temperature is provided in the valve core installation channel 91, and the temperature sensing element 96 is used to drive the valve core 95 to move axially along the valve core installation channel 91.

[0026] In this embodiment, the temperature sensing element 96 is a temperature bulb.

[0027] In this embodiment, a mixing zone 99 is provided in the valve core 95, and at least two openings are provided on the valve core 95 for connecting the channel group and the mixing zone 99. One end of the temperature sensing element 96 is placed in the mixing zone 99 and connected to the valve core 95, and the other end of the temperature sensing element 96 is fixedly arranged.

[0028] As another embodiment, one end of the valve core 95 is always in communication with the output channel 94 in the channel group, and the valve core 95 is provided with two openings in communication with the mixed flow area 99 , and the openings can be communicated with the input channel.

[0029] In this embodiment, both ends of the valve core 95 are open, and the temperature sensing element 96 is disposed in the valve core 95 and one end of the temperature sensing element 96 extends out of the valve core 95 and is fixedly connected to the stopper 98 .

[0030] In this embodiment, the valve core 95 is provided with three openings, which are respectively used for connecting the first input channel 92 , the second input channel 93 , and the output channel 94 in the channel group with the mixed flow area 99 .

[0031] In this embodiment, one end of the temperature sensing element 96 is fixed to the stopper 98 and the other end is connected to the valve core 95. When the temperature sensing element 96 expands or contracts, it can drive the valve core 95 to reciprocate.

[0032] In this embodiment, a spring 97 is provided between the valve core 95 and the valve core installation passage 91 .

[0033] In this embodiment, the spring 97 is disposed between the temperature sensing member 96 and the end of the valve core installation passage 91 . Specifically, the spring 97 is disposed at an end of the temperature sensing member 96 away from the stopper 98 .

[0034] In this embodiment, the channel group includes a first input channel 92, a second input channel 93 and an output channel 94, the mixed flow zone 99 is connected to the output channel 94, and the valve core 95 moves to adjust the connection ratio between the mixed flow zone 99 and the first input channel 92 and the second input channel 93.

[0035] In this embodiment, a pressure measuring joint 15 is provided on the valve block 90 , and the pressure measuring joint 15 is connected to the mixed flow area 99 for testing the liquid pressure in the mixed flow area 99 .

[0036] In this embodiment, one end of the valve core installation passage 91 is open, and a stopper 98 connected to the temperature sensing element 96 is provided at the open end.

[0037] In this embodiment, the stopper 98 may be sealedly connected to the open end of the valve core installation passage 91 .

[0038] In this embodiment, the stopper 98 is fixedly connected to one end of the temperature sensing element 96 .

[0039] In this embodiment, the valve block 90 is a cubic structure, and the channel group includes a first input channel 92, a second input channel 93 and an output channel 94. The first input channel 92, the second input channel 93 and the output channel 94 are all connected to the valve core installation channel 91 and are respectively placed on different end faces of the valve block 90.

[0040] In this embodiment, the first input channel 92 and the output channel 94 are disposed on opposite surfaces of the valve block 90 , and the second input channel 93 is disposed on a surface perpendicular to the valve core installation channel 91 .

[0041] In this embodiment, the output channel 94 is connected to an external pipe fitting 19 , and the pipe fitting 19 is provided with a second temperature sensor 10 .

[0042] Working principle of the mixing valve 9: when the liquid is lower than the set opening temperature, the temperature bag of the valve core 95 has not reached the expansion point, the valve core 95 is in a fully open state and does not move, and the liquid directly flows out to various points through the mixing valve; when the liquid temperature is higher than the set opening temperature, the temperature bag begins to expand, the valve core 95 enters the working stroke and closes, and the flow of liquid entering the mixing valve from different channels is adjusted, and the liquid flows out to various points after mixing; when the liquid reaches the set maximum opening temperature, the temperature bag expands completely, the valve core 95 is in a fully closed state, and only the input channel of the cooling device is connected to the output channel 94, and the cooled liquid flows out to various points; the start and stop of the cooling device is controlled by the mixed oil temperature and the measurement value of the temperature sensor 10 to ensure that the oil temperature entering each point is within the required range.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mixing valve, comprising a valve block (90), wherein the valve block (90) is provided with a valve core installation channel (91) and a channel group that can communicate with the valve core installation channel (91), wherein a valve core (95) is provided in the valve core installation channel (91), and the valve core (95) is used to adjust the communication ratio between the channel groups; characterized in that: A temperature sensing element (96) that can expand or contract according to temperature is provided in the valve core installation channel (91), and the temperature sensing element (96) is used to drive the valve core (95) to move axially along the valve core installation channel (91).

2. A mixing valve according to claim 1, characterized in that: A mixed flow area (99) is provided in the valve core (95), and at least two openings are provided on the valve core (95) for connecting the channel group and the mixed flow area (99). One end of the temperature sensing element (96) is placed in the mixed flow area (99) and connected to the valve core (95), and the other end of the temperature sensing element (96) is fixedly arranged.

3. A mixing valve according to claim 2, characterized in that: A spring (97) is provided between the valve core (95) and the valve core installation passage (91).

4. A mixing valve according to claim 2, characterized in that: The channel group includes a first input channel (92), a second input channel (93) and an output channel (94); the mixed flow area (99) is connected to the output channel (94); the valve core (95) moves to adjust the communication ratio between the mixed flow area (99) and the first input channel (92) and the second input channel (93).

5. A mixing valve according to claim 2, characterized in that: The valve block (90) is provided with a pressure measuring joint (15), and the pressure measuring joint (15) is connected to the mixed flow area (99) for testing the liquid pressure in the mixed flow area (99).

6. A mixing valve according to any one of claims 1 to 5, characterized in that: One end of the valve core installation passage (91) is open, and a stopper (98) connected to the temperature sensing element (96) is provided at the open end.

7. A mixing valve according to any one of claims 1 to 5, characterized in that: The valve block (90) is a cubic structure, and the channel group comprises a first input channel (92), a second input channel (93) and an output channel (94); the first input channel (92), the second input channel (93) and the output channel (94) are all connected to the valve core installation channel (91) and are respectively placed on different end surfaces of the valve block (90).

8. A mixing valve according to claim 7, characterized in that: The first input channel (92) and the output channel (94) are disposed on opposite surfaces of the valve block (90), and the second input channel (93) is disposed on a surface perpendicular to the valve core installation channel (91).

9. A mixing valve according to claim 7, characterized in that: The output channel (94) is externally connected to a pipe fitting (19), and a second temperature sensor (10) is provided on the pipe fitting (19).

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